Here I've carefully transferred the singles to my wrist - this is done by carefully sliding the singles over my hand while ever so carefully working the spatula free of the singles in addition to keeping track of the two free ends. Once the yarn is wrapped, I tied both ends of the yarn to my leader and away we went. It was a bit touch and go a few times, and certainly this was probably not as fast or smooth a ply-job as it would have been had I been plying off a pair of bobbins. There were some times when I thought for sure I would have to break the yarn - there were other times when the singles threatened to snarl into an unruly mess....
here is the yarn, freshly washed, whacked and dried. Some areas were not quite as evenly plied - but thus is the nature of handspun.
and here it is from the other side.
If you are wondering just how big a skein this is, you can see my fingers peeking out from underneath here.